--- a/js/src/jit/CodeGenerator.cpp
+++ b/js/src/jit/CodeGenerator.cpp
@@ -1020,16 +1020,28 @@ CodeGenerator::visitOsrScopeChain(LOsrSc
 
     const ptrdiff_t frameOffset = StackFrame::offsetOfScopeChain();
 
     masm.loadPtr(Address(ToRegister(frame), frameOffset), ToRegister(object));
     return true;
 }
 
 bool
+CodeGenerator::visitOsrArgumentsObject(LOsrArgumentsObject *lir)
+{
+    const LAllocation *frame   = lir->getOperand(0);
+    const LDefinition *object  = lir->getDef(0);
+
+    const ptrdiff_t frameOffset = StackFrame::offsetOfArgumentsObject();
+
+    masm.loadPtr(Address(ToRegister(frame), frameOffset), ToRegister(object));
+    return true;
+}
+
+bool
 CodeGenerator::visitStackArgT(LStackArgT *lir)
 {
     const LAllocation *arg = lir->getArgument();
     MIRType argType = lir->mir()->getArgument()->type();
     uint32_t argslot = lir->argslot();
 
     int32_t stack_offset = StackOffsetOfPassedArg(argslot);
     Address dest(StackPointer, stack_offset);